/*导航条*/
#nav{
    width: 100%;
    height: 70px;
    position: fixed;
    bottom:0px;
    background: url(../img/topbg.jpg) repeat;

}
.navcon{
    height: 100%;
    width: 100%;
    border-top: 1px solid #ccc;

}
.navcon .navbutton{
    width: 33%;
    height:100% ;
    position: relative;
    float: left;
}
.navcon .navbutton img{
    height: 40px;
    width: 40px;
    position: absolute;
    left: 50%;
    margin-left: -15px;
    margin-top: 5%;
}
.navcon .navbutton a{
    font-size: 12px;
    position: relative;
    display: inline-block;
    width: 100%;
    text-align: center;
    margin-top: 40%;
    margin-left: 4%;
    color: white;
}

.bu4{
	font-weight: bold;
}

